Edge of Skyhigh Game System: Sony Playstation Cheat Category: Cheat Game Company: Unknown Game Category: Unknown Hint, Cheat, Walkthrough:   Edge of Skyhigh =============== Level select: Pause game play, hold L1 + L2 + R1 + R2, and press Triangle, Square, Right, Down, Left, Up. Invincibility: Pause game play and press Up(2), Right(2), Down(2), Left(2), Square, Triangle, Square, Triangle.